Java™ How To Program (Early Objects), Tenth Edition

Method getAverage

Method getAverage (lines 86–96) takes one argument—a one-dimensional array of test results for a particular student. When line 153 calls getAverage, the argument is grades[student], which specifies that a particular row of the two-dimensional array grades should be passed to getAverage. For example, based on the array created in Fig. 7.19, the argument grades[1] represents the three values (a one-dimensional array of grades) stored in row 1 of the two-dimensional array grades. Recall that a two-dimensional array is one whose elements are one-dimensional arrays. Method getAverage calculates the sum of the array elements, divides the total by the number of test results and returns the floating-point result as a double value ...